package com.mcj.managementSystem.controller;


import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.poi.excel.ExcelReader;
import cn.hutool.poi.excel.ExcelUtil;
import cn.hutool.poi.excel.ExcelWriter;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;

import com.mcj.managementSystem.common.Constants;
import com.mcj.managementSystem.common.Result;
import com.mcj.managementSystem.controller.dto.UserDTO;
import com.mcj.managementSystem.utils.TokenUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.List;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import com.mcj.managementSystem.service.IUserService;
import com.mcj.managementSystem.entity.User;

import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author 妙脆角
 * @since 2022-05-18
 */
@RestController
@RequestMapping("/user")
public class UserController {

    @Resource
    private IUserService userService;

	@PostMapping("/login")
	public Result login(@RequestBody UserDTO userDTO) {
		String username = userDTO.getUsername();
		String password = userDTO.getPassword();
		if (StrUtil.isBlank(username) || StrUtil.isBlank(password)) {
			return Result.error(Constants.CODE_400, "参数错误");
		}
		UserDTO dto = userService.login(userDTO);
		return Result.success(dto);
	}
	
	@PostMapping("/register")
	public Result register(@RequestBody UserDTO userDTO) {
		String username = userDTO.getUsername();
		String password = userDTO.getPassword();
		if (StrUtil.isBlank(username) || StrUtil.isBlank(password)) {
			return Result.error(Constants.CODE_400, "参数错误");
		}
		return Result.success(userService.register(userDTO));
	}
	
    // 新增或者更新
    @PostMapping
    public boolean save(@RequestBody User user) {
		return userService.saveOrUpdate(user);
	}

    @DeleteMapping("/{id}")
    public Boolean delete(@PathVariable Integer id) {
		return userService.removeById(id);
	}

    @PostMapping("/del/batch")
    public boolean deleteBatch(@RequestBody List<Integer> ids) {
		return userService.removeByIds(ids);
	}

    @GetMapping
    public List<User> findAll() {
		return userService.list();
	}

    @GetMapping("/{id}")
    public User findOne(@PathVariable Integer id) {
		return userService.getById(id);
	}
	
	@GetMapping("/username/{username}")
	public Result findOne(@PathVariable String username) {
		QueryWrapper<User> queryWrapper = new QueryWrapper<>();
		queryWrapper.eq("username", username);
		return Result.success(userService.getOne(queryWrapper));
	}
	
	@GetMapping("/page")
	public Page<User> findPage(@RequestParam Integer pageNum,
							   @RequestParam Integer pageSize,
							   @RequestParam(required = false) String username,
							   @RequestParam(required = false) String email,
							   @RequestParam(required = false) String address) {
		QueryWrapper<User> queryWrapper = new QueryWrapper<>();
		if (StringUtils.hasText(username)) {
			queryWrapper.like("username", username);
		}
		if (StringUtils.hasText(email)) {
			queryWrapper.like("email", email);
		}
		if (StringUtils.hasText(address)) {
			queryWrapper.like("address", address);
		}
		return userService.page(new Page<>(pageNum, pageSize), queryWrapper);
	}
	
	/**
	 * 导出接口
	 */
	@GetMapping("/export")
	public void export(HttpServletResponse response) throws Exception {
		// 从数据库查询出所有的数据
		List<User> list = userService.list();
		// 通过工具类创建writer 写出到磁盘路径
//        ExcelWriter writer = ExcelUtil.getWriter(filesUploadPath + "/用户信息.xlsx");
		// 在内存操作，写出到浏览器
		ExcelWriter writer = ExcelUtil.getWriter(true);
		//自定义标题别名
		writer.addHeaderAlias("username", "用户名");
		writer.addHeaderAlias("password", "密码");
		writer.addHeaderAlias("nickname", "昵称");
		writer.addHeaderAlias("email", "邮箱");
		writer.addHeaderAlias("phone", "电话");
		writer.addHeaderAlias("address", "地址");
		writer.addHeaderAlias("createTime", "创建时间");
		writer.addHeaderAlias("avatarUrl", "头像");
		
		// 一次性写出list内的对象到excel，使用默认样式，强制输出标题
		writer.write(list, true);
		
		// 设置浏览器响应的格式
		response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
		String fileName = URLEncoder.encode("用户信息", "UTF-8");
		response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
		
		ServletOutputStream out = response.getOutputStream();
		writer.flush(out, true);
		out.close();
		writer.close();
	}
	
	/**
	 * 导入接口
	 */
	@PostMapping("/import")
	public Boolean imp(MultipartFile file) throws Exception {
		InputStream inputStream = file.getInputStream();
		ExcelReader reader = ExcelUtil.getReader(inputStream);
		// 方式1：(推荐) 通过 javabean的方式读取Excel内的对象，但是要求表头必须是英文，跟javabean的属性要对应起来
//        List<User> list = reader.readAll(User.class);
		// 方式2：忽略表头的中文，直接读取表的内容
		List<List<Object>> list = reader.read(1);
		List<User> users = CollUtil.newArrayList();
		for (List<Object> row : list) {
			User user = new User();
			user.setUsername(row.get(0).toString());
			user.setPassword(row.get(1).toString());
			user.setNickname(row.get(2).toString());
			user.setEmail(row.get(3).toString());
			user.setPhone(row.get(4).toString());
			user.setAddress(row.get(5).toString());
			user.setAvatarUrl(row.get(6).toString());
			users.add(user);
		}
		userService.saveBatch(users);
		return true;
	}
}

